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CML and Sperm quality

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My boyfriend was diagnosed in may 2018 with cml. He has just got the semen analysis which shows the mobility progressive is 11% (normal is >32%); morphology is 2% ( normal is >4%). Other indexs are normal

Has anyone got the experience on this topic? We are worried that it is difficult to make baby. Please give us advice?

"One previous case report from our hospital confirmed thepresent finding of the negative effects of imatinib on spermparameters in CML-CP patients. A male CML-CP patientwho had received imatinib treatment for 4 years, did not discontinueimatinib treatment at the time of conception. Thispatient exhibited a lower sperm survival rate (43.54%), andreduced sperm activity (16.7%). However, he successfullyconceived, and a healthy baby was born after a normal pregnancy[24]. Follow-up on the baby was performed 36 monthsafter birth, and the results demonstrated that the baby grewnormally and remained healthy. Similar instances of the abilityof male CML patients to conceive during imatinib treatmentwere reported, despite declines in sperm count, survival rate,and activity [25, 26]. However, more clinical studies are neededto evaluate the effects of imatinib on conception and fertilityin male CMP patients.In summary, this investigation suggests that imatinib crossesthe blood-testis barrier and reduces sperm count, survival rates,and activity in CML-CP patients. However, reproductive organstructure and sex hormone levels were not affected. Futurestudies should elucidate the mechanisms of imatinib penetrationof the blood-testis barrier and its effects on conceptionand fertility."

My sperm was "banked" back when I was diagnosed. I don't have any statistics to hand, but there were no particular concerns about quality and I wasn't told that CML could affect it.

Given the consensus is forming that it's OK to father (but not mother) a child on a TKI we decided that we would not use frozen sperm, and went about things the old fashioned way (with discussion and agreement with doctor) while I was taking dasatinib.